Late last week Facebook quietly made changes to a set of advanced features that previously allowed users to search the social network in powerful ways, such as finding all posts on Facebook by a keyword and within a certain date range, all of the people who like a certain Facebook Page and live in a particular city, or places visited by two specific users. Advertisement All of the information gathered by these search features is from user’s public profiles, but the news highlights Facebook’s recent emphasis on privacy, and comes after a series of privacy and security incidents at the company.

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